I really had a blessing with this job. An older lady in my church has been having a heck of a time with her old tub in her house. She is unsteady enough that she can't get in and out of the tub by herself anymore, and has had a nurse come out and help her. She has fallen several times and hurt herself. Well, our church decided to do something about it and they asked me if I would take out her old tub and put something in that would enable her to get in and out a bit safer.
I started with the demo, and what I found is she has a 30+ year old house. This house also had a window in the shower. I knew I would end up finding mold behind the walls seeing I have delt with this configuration many times. Demo went well, and I pulled out all the old stuff and put in new, after killing all mold with some strong bleach. I ended up closing off the window from the outside and putting all new insulation in after putting down a layer of kilz.
Digging out the drain and shimming the walls plum was my biggest obstacles but everything worked out in the end. Also, building out the shower walls so I can add support handles for her was another needed item.
The final goal was to keep the cost as low as possible but make a safe environment so she can manage by herself or with little help. It turned out great, and I got to spend a lot of time fellowshipping with a sweet person.